Vaisala GMP251 - Serial Line Mode Commands; Relay Configuration Commands

1.3.3 Serial Line Mode Commands
Only serial mode commands related to relay operation are presented here. For other serial
mode configuration options, see the User Guides of the GMP251/252 probes.
Table 3 Smode Command
Syntax Description
smode<cr>
Shows the current start-up operating mode of the
serial line.
smode [mode]<cr>
Set serial line start-up operating mode. The new mode
is taken into use when the device is reset or powered
up. Note: only use the RELAY2 option.
Available modes:
RELAY1 = Voltage output channel: do not use for relay
control with the GMP250 relay box.
RELAY2 = Set analog output channel 2 (current) to
relay control: use only this option with the relay box.
Example (set serial mode to "RELAY2" (channel 2 current output)):
smode RELAY2
Serial mode : RELAY2
1.3.4 Relay Configuration Commands
Table 4 Rsel Command for GMP250 Software Version 1.3.1 or Later
Syntax Description
rsel [channel]<cr>
Show current relay settings.
channel = Analog output channel
Relay Box for GMP250 Carbon Dioxide Probes Quick Guide M211920EN-C
8